DELETE FROM `absence`;
INSERT INTO `absence` VALUES (3,'2012-09-03');
INSERT INTO `absence` VALUES (5,'2012-09-03');
INSERT INTO `absence` VALUES (10,'2012-09-06');
INSERT INTO `absence` VALUES (10,'2012-09-09');
INSERT INTO `absence` VALUES (17,'2012-09-07');
INSERT INTO `absence` VALUES (20,'2012-09-07');
